1. 野人与传教士过河问题：有传教士和野人各三人需要过河，他们都会划船。现只有一条船，一次只能载两人。假设野人多于传教士时传教士就会被吃掉。编程求出所有能确保全部安全的过河的计划，并给出Visual Prolog程序-1. Savage and missionaries across the river problem: There are three missionaries and savages the need to cross the river, they will be boati